Cut-film holder.



A. M.SCH0ENBERG1 CUT FILM HOLDER,

APPLICATION man 0cT.1e, 19:6.

Patented Aug. 21, 1917.

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ALBERT SCHOENBEBG, 0F SPOKANE, WASHINGTON.

CUT-FILM HOLDER.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed October 16, 1916. Serial No. 125,899.

To all whom it may concern:

Be it known that I, ALBERT M. SCHOEN- BERG, a citizen of the UnitedStates, residing at Spokane, in the county of Spokane an State ofWVashington, have invented certain new and useful Improvements inCut-Film Holders, of which the following is a specification.

My invention relates to improvements in cut film holders, and the objectof my invention is the provision of a device of this character of cheap,light, simple and eflicient construction, which will adequately serve toretain the film in a fiat, distended state and prevent curling thereofduring the several immersions or baths to which the same is subjectedduring the processes of fixing, washing, etc.

Broadly, my holder comprises a rigid rectangular frame, spring tensionmembers secured to opposite sides of the frame, spring clips carried bythe tension members, and means for adjusting the tension members.

The details of construction, combination, and arrangement of partscomprising my complete device, will be hereinafter fully described andclaimed, recourse being had to the accompanying drawings forming a partof my application for patent, and in which- Figure 1 is a plan view ofthe device with a portion of the frame member broken away to showclearly the arrangement, construction, and disposition of the springfilm retaining elements.

Fig. 2 is an enlarged perspective detail view of one corner of theframe, a section of one of the tensioning springs, and the spring clipscarried thereby.

Fig. 3 is an end elevation of a number of my holders indicating themanner of disposing the same in a tank in groups or series, and thestaggered arrangement of the tensioning members and the film clips, afeature of my invention.

Referring more specifically to the drawings in which like referencecharacters are used to indicate like parts in the several views, thenumeral 1 designates the rectangular frame which is preferably of metal,the sides and ends thereof being formed U-shaped in cross-section or ofchannel construction to insure strength and rigidity, and thus providingan outer wall 2 and the inwardly extended flange portions 3. Secured tosaid outer wall at opposite ends of relation to said end the frame andby means of the rivets 4 are the fiat spring tension members 5, saidrivets securing the members at points intermediate of their ends so thattheir end portions may be freely extended under tension by properadjustment of the buttons 6 which are slidably mounted, in cooperativeortions of the spring members, in the longitudinal slots 7 in the outerwall 2 of the frame.

As clearly shown in Fig. 1 these buttons have the spring engaging knobs8, shanks 9, and operating heads 10, the latter rojecting outwardly fromthe outer face of the frame in order that they may be convenientlygripped for sliding adjustment of the buttons in the slots.

These spring tension members 5 normally extend parallel with and lieflat against the adjacent inner face of the outer wall 2 to which theyare secured, and carry at either extremity inwardly extended centralspring clip members 11 provided with notches 12 near their freeends andhaving mounted thereon at opposite sides companion hinged spring clips13 adapted to engage said notches with their ends to tightly hold thefilms in place.

In securing the photographic films in the holder the buttons 6 are firstmoved in their respective slots 7 in the direction of the rivetedportion of the springs 5 so that the engaging knobs 8 will force thefree end portions of the springs under tension into the osition shown atthe right of Fig. 1.

T e films are then secured at their corners by the spring clips, as isalso indicated in Fig. 1. Then the buttons 6 are moved along theirrespective slots 7 until the film is properly outstretched or distended,it being understood that the tension of the springs 5 will serve toaccomplish this result when said buttons are so moved as to allow theend ortions to return toward their normal position.

In order that the frames may nest closely together and hence a maximumnumber be accommodated in the washing and fixing tanks, every frame inthe group or series has its spring tension members 5 offset with respectto the center of their respective retaining walls 2, and are placed inthe tanks in alternate order.

As the spring clips 13 project beyond the faces of the frames, thisarrangement,

shown in Fig. 3, the tank being indicated by the fragments at 14, servesto stagger the corresponding clips of adjacent frames and to provide thenecessary clearance between the clips.

The-advantages of my holder are obvious. Each frame accommodates twofilms within a very limited compact space, while the tension exerted bythe spring members 5 serves to properly maintain the films outstretchedand revents curling thereof, so that when the rames are inserted in thetank or other container for washing, fixing, etc., they will be held outof contact with or adeiuately spaced from the ad'acent film and itsolder.

Having describe my invention, I claim 1. A cut film holder comprising aframe, tensionin means secured to said frame within the si e wallsthereof for retaining films or other flexible sheets under tension, andadjusting means for said tensioning means.

2. A cut film holder comprising a frame, s ring tension members securedto opposite s1des of the frame, film retaining devices carried by saidtension members, and adjusting means for the tension members.

3. A cut film holder comprising a frame, spring tension members securedto opposite s1des of the frame intermediate of their ends, filmretaining devices carried b the free ends of said tension members, anadjustigg devices mounted in the frame and adap for engagement with andadjustment of the tension members with respect to the frame.

4. A cut film holder comprising a frame, as spring tension membersfixedly secured to opposlte sides of'the frame and within the scopethereof, inwardly extended film retaining members carried by saidtension members, spring clips mounted in pairs on 40 said retainingmembers, and adjusting means for adjusting said tension members withrespect to said frame.

- 5. A cut film holder comprising a frame,

spring tension members secured to op osite 46 sides of the frame andintermediate 0 their ends, and within the side walls of the frame,longitudinally slidable adjusting members mounted in the walls of saidframe in adjacent relation to said tension members, and film retainingmembers carried by said tension members.

6. In combination with a receptacle or frame holding device havingspaced receiving means for cut film holders, of'a cut film holdercomprising a frame, spring tension members secured to opposite sides ofthe frame and within the side walls thereof, and film retaining devicescarried by said tension 1 members. V

In testimony whereof I aflix my signature. e

ALBERT M. SCHOENBERG.

